Inliners International Forums General Discussion Engines One barrel carbs ?

I'm picking up 3 carbs for $20 & $8 ship .
sounds good , One is usable others are rebuilable & I will play with the others trying to learn A little more about these type of carbs . Possibly combine the parts from A couple making one good one .
Who knows about the 1-3/4 though . What would it even fit ?